Timeline for what is the intersection of all congruence subgroups of the profinite completion of SL(2,Z)?
Current License: CC BY-SA 3.0
4 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Jan 1, 2015 at 4:09 | comment | added | Ian Agol | Yes, that is basically the Chinese remainder theorem, I believe, plus the fact that SL_2Z surjects SL_2 F_p | |
| Dec 31, 2014 at 23:42 | comment | added | Will Chen | Do you know if the map $\widehat{ SL_2(\mathbb{Z})}\rightarrow SL_2(\widehat{\mathbb{Z}})$ is surjective? | |
| Dec 23, 2014 at 17:43 | vote | accept | Will Chen | ||
| Dec 23, 2014 at 5:05 | history | answered | Ian Agol | CC BY-SA 3.0 |